APG RP Resistive Chain user manual - Manual (Page 4)

RPE & RPX Series Rev. B3, 10/09
4
Automation Products Group, Inc.
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• Description
The RPE/RPX utilizes reed switches in the instrument’s stem and a permanent
magnet in the float. As the float rises or falls with the level of the liquid, the
magnet inside the float act on the reed switches inside the stem and provides a
resistive-chain output. The RPE/RPX is also available with optional
electronics that convert the resistance output into a 4-20mA signal.